Acquisitions - Aggregate Consideration Paid (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Jul. 15, 2019 |
Mar. 31, 2018 |
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| Nuevolution | ||
| Business Acquisition [Line Items] | ||
| Total consideration transferred to acquire K-A | $ 183 | |
| Kirin-Amgen, Inc. (K-A) | ||
| Business Acquisition [Line Items] | ||
| Total cash paid to Kirin | $ 780 | |
| Fair value of contingent consideration obligation | 45 | |
| Loss on settlement of preexisting relationship | (168) | |
| Total consideration transferred to acquire K-A | 657 | |
| Fair value of Amgen’s investment in K-A | 825 | |
| Total acquisition date fair value | $ 1,482 | |
| R & D Technology rights | Nuevolution | ||
| Business Acquisition [Line Items] | ||
| Weighted average period of amortization | 10 years |
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- Definition Business Combination, Fair Value of Contingent Consideration Arrangements, Addition from Acquisitions No definition available.
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition In a business combination achieved in stages, this element represents the amount of loss recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. No definition available.
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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